Constant Rate Infusions Calculator

Constant Rate Infusions (CRI) are used to administer medications or fluids at a steady, continuous rate. This calculator helps determine the appropriate infusion rate and drug volume for a CRI.

Follow these steps to calculate the CRI:

Step 1: Enter Basic Information

Step 2: Enter Fluid Information (Optional)

Example Calculation:

Formulas Used:

Drug rate (mL/hour) = Dose (mg/kg/hour)×Weight (kg)Concentration (mg/mL)\frac{\text{Dose (mg/kg/hour)} \times \text{Weight (kg)}}{\text{Concentration (mg/mL)}}

Fluid bag duration (hours) = Fluid bag volume (mL)Fluid rate (mL/hour)\frac{\text{Fluid bag volume (mL)}}{\text{Fluid rate (mL/hour)}}

Drug volume to add (mL) = Drug rate (mL/hour)×Fluid bag duration (hours)\text{Drug rate (mL/hour)} \times \text{Fluid bag duration (hours)}